The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys
Effect of Pb addition on magnetocaloric properties of Ni50Mn18,75Cu6,25-aPbaGa25 (a = 1, 2, 3, 4, 5) alloys was investigated experimentally. The magnetic measurements conducted at low field of 4 kA/m showed that addition of Pb led to separation of the both transformation temperatures and significantl...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2020-05-01
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| Series: | Archives of Metallurgy and Materials |
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| Online Access: | https://journals.pan.pl/Content/116064/PDF/AMM-2020-2-41-Zygmuntowicz.pdf |
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| author | K. Sielicki J. Zygmuntowicz R. Wróblewski M. Leonowicz |
| author_facet | K. Sielicki J. Zygmuntowicz R. Wróblewski M. Leonowicz |
| author_sort | K. Sielicki |
| collection | DOAJ |
| description | Effect of Pb addition on magnetocaloric properties of Ni50Mn18,75Cu6,25-aPbaGa25 (a = 1, 2, 3, 4, 5) alloys was investigated experimentally. The magnetic measurements conducted at low field of 4 kA/m showed that addition of Pb led to separation of the both transformation temperatures and significantly shifted the structural transition effect towards lower temperatures as well as increased the Curie temperature. The analysis of isothermal magnetic curves allowed for the calculation of magnetic entropy change (ΔSM). Although the peak values of |ΔSM| for alloys containing 4 and 5 at.% Pb, ~3 J/(kg*K) and ~1.5 J/(kg*K) respectively, are low they stretch over the structural transformation and Curie temperature, and are at least 30 K wide at half maximum height. |
| first_indexed | 2024-04-12T07:39:41Z |
| format | Article |
| id | doaj.art-0bcd0bb87e6047a0828b385a14002321 |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-04-12T07:39:41Z |
| publishDate | 2020-05-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-0bcd0bb87e6047a0828b385a140023212022-12-22T03:41:51ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092020-05-01vol. 65No 2823825https://doi.org/10.24425/amm.2020.132827The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga AlloysK. SielickiJ. ZygmuntowiczR. WróblewskiM. LeonowiczEffect of Pb addition on magnetocaloric properties of Ni50Mn18,75Cu6,25-aPbaGa25 (a = 1, 2, 3, 4, 5) alloys was investigated experimentally. The magnetic measurements conducted at low field of 4 kA/m showed that addition of Pb led to separation of the both transformation temperatures and significantly shifted the structural transition effect towards lower temperatures as well as increased the Curie temperature. The analysis of isothermal magnetic curves allowed for the calculation of magnetic entropy change (ΔSM). Although the peak values of |ΔSM| for alloys containing 4 and 5 at.% Pb, ~3 J/(kg*K) and ~1.5 J/(kg*K) respectively, are low they stretch over the structural transformation and Curie temperature, and are at least 30 K wide at half maximum height.https://journals.pan.pl/Content/116064/PDF/AMM-2020-2-41-Zygmuntowicz.pdfmagnetocaloric effectmagnetic entropy changecurie temperatureheusler alloys |
| spellingShingle | K. Sielicki J. Zygmuntowicz R. Wróblewski M. Leonowicz The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys Archives of Metallurgy and Materials magnetocaloric effect magnetic entropy change curie temperature heusler alloys |
| title | The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys |
| title_full | The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys |
| title_fullStr | The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys |
| title_full_unstemmed | The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys |
| title_short | The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys |
| title_sort | magnetic entropy changes in pb doped ni mn cu ga alloys |
| topic | magnetocaloric effect magnetic entropy change curie temperature heusler alloys |
| url | https://journals.pan.pl/Content/116064/PDF/AMM-2020-2-41-Zygmuntowicz.pdf |
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